Elevator system



Aug. 29, 1933. H. v. MccoRMxcK ELEVATOR SYSTEM Filed Feb. 6, 1952 2 Sheets-Sheet l K. 7 .C 3 3 3 3, M 3 ,M333 m M, 3 3 fw? 3 u) Mc O D W EM n VK. A LL Wm M H3 e 0\| 3,3@3 3W w 3,3, al@ Y M Y @la |Il|,l.51|.|/V|l||l||l|l| lll M 7 9 3 l J 43 9 ,a M ff 3 3 34 e 3 1 l I 1 i I l l ||5 e 4. @a 6 6 3\7 \^.\Z 5 5 n @l 3 .3 333, 3 3 63 We m o www" 2 E \u. QQ. E 3, X333 3&4 3 f 2 1,4 4 4 4 w 50 533W/ Z E m3 WW ug- 29, 1933. H. vqMccoRMlcK n 1,924,367

ELEVATR SYSTEM Filed Feb. 6, 1932 2 Sheets-Sheet 2 ESF' M MF La INVENTOR Haro/a l/.MCCorm/'G Hu BY M ATT EY Patented Aug. 29, 1933 unirse vSTATES PATNT oFFlcE 1,924,367 ELEVATOR SYSTEM Harold V. McCormick, Evanston, ll., assigner to Westinghouse Electric Elevator Company, a corporation of Illinois Application February 6, 1932. Serial No. 591,378 9 claims. (cl. iev-29) My invention relates to elevator systems in designated by the supply conductors L1 and L2. which the hatchway doors at the floor landings The direction and speed of operation of the must be closed and mechanically locked when motor EM is suitably controlled by controlling the cars are not making stops at such landings. the direction and value of theexcitation current 5 One object of my invention is to prevent any supplied to the separately excited eld winding 60 unsafe operation of an elevator car after any GF of the generator G. one of the hatchway doors associated with it The direction of the excitation current for the is unlocked. eld current GF is suitably controlled by means Another object of my invention is to provide of an up direction switch 1 and a down dian elevator system in which the deceleration of rection switch 2, while the value of the current 65 an elevator car to a stop, the unlocking and Supplied t0 the field Winding GF iS C0ni'1r0lled by opening of the hatchway door when the car has means of an intermediate speed relay 3 and a decelerated to within a few inches of the stop, high speed relay 4. and the nal stopping of the car level with the A brake 9 is provided for preventing rotation floor may be followed by a disablement of the of the hoisting drum D when the hoisting motor 70` elevator control system to prevent further operaiS nel? in OperatiOn The brake 9 iS COnIOlled x tion of the car until the hatchway door is by a brake magnet 10 which is connected in reclcsed and mechanically locked in its closed series with the coils of the direction switches in position. such manner that it will be deenergized to per- Further objects of my invention will in part mit the application 0f the brake 9 when the di- 75-A be obvious, and will in part appear hereinafter. rection switches are deenergized to stop the car. f

For an illustration of one of the various A car switch CSV is mounted in the elevator forms my invention may take, reference may be Cal' C O be aCllatECl. by the attendant OIl 'the had to the accompanying drawings in which: car for controlling the operation of the direc- Figure 1 is a view in elevation of the interior tien switches 1 and 2 and the speed relays 3 and so-Y of an elevator hatchway illustrating the hatch- 4 'GO mOVe the Car aS desired. way doors and also illustrating, in section, an A control system of any Suitable type may be elevator car disposed in the hatchway; employed for automatically stopping the car C Fig. 2 is an enlarged view, in side elevation, level with the noors past which it moves when 3o of the means for locking the hatchway doors the ear switch CS is moved t0 its Central or ear 85l shown in Fig. 1; stopping position. As a suitabler system ofcon- Fig. 3 is an enlarged View in front elevation trol, I have illustrated a system of the autoshowing the hatchway door lock with its cover matie illdllCtOI landing type which iS disclosed in removed, and the copending application of E. M. Bouton,

25 Fig. 4 is a diagrammatic representation of the Serial NO- 731,921y lefl AllellSt 14, 1924, and as- 90 elevator system for operating the car and the Signed U0 the WeStinghOllSe EleCtI-C & Manufacdoors in the hatchway shown in Fig. 1. turing COmDanyy Referring more particularly to the drawings, The induetor landing system includes an up I have illustrated therein an elevator car C suithigh Speed ndllCtOl Arelay HU and an up in- 40 ably suspended in a hatchway 8 by a cable Ca termediate speed relay SU for causing the car 95 which passes over a hoisting drum D to a suitable to be automatically decelerated from its high and counterweight Cw. The hoisting drum D is intermediate Speeds, IeSDeCVely; and a SOD- directly coupled to, and operated by, the armaping induetor relay S for automatically bringing ture EM of an elevator driving motor EM. the decelerated car to a stop at an exact level 4.3 The control system for the driving motor EM with the floor when the car is travelling upis illustrated as being of the variable voltage type Wardly. Similarly, a down high speed inwherein the armature EM of the motor is eonduetor relay HD7 a down intermediate speed nected in loop-circuit with the armature G of relay SD and ille alllOnieiClly Stepping relay S a generator G. The generator G ls provided Will Cause the Car te slew down and stop at the Il witha separately excited field winding GF and flOOlS When it is travelling downwardly. 105 a series held winding ESF. The armature G of In this system, each 0f the 110er landings past the generator G is suitably driven by means of which the car moves should be provided with a a motor M illustrated as a shunt wound type set of inductor plates `for coperation with the in. having its armature M and a field winding MF ductor relays as the car approaches predeterc'onnected in shunt relation to a source of power mined pointsin advance' of the landings to cause 110 the car to stop thereat, when the car switch is centered for a stop.

The inductor plates for one iioor landing are illustrated as comprising an up high speed inductor plate I-IU, an up intermediate speed inductor plate SU', and a stopping inductor plate S for successively operating the inductor relays HU, SU and S when the car, moving upwardly, approaches the floor level at which the inductor plates are disposed.

When the car is travelling downwardly, the high speed inductor plate HD', the intermediate speed inductor plate SD and the stopping inductor plate S will successively operate the inductor relays I-ID, SD and S, respectively, as the car approaches the iioer landingat which the plates are disposed, to decelerate the car and stop it at the landing.

As shown in Fig. 1, the hatchway 8 is provided with a hatchway door comprising a pair of slidable panels 11 and 12. The door panels 11 and 12 are operably connected by means of a pair of racks 13 and 14 and a pinion 15 in such manner that movement of panel 12 to an open or to a closed position will vcause the panel 11 to also move to its open or to its closed position.

The means for operating the door panels 11 and 12 comprises a pair ofv toggle levers 16 and 17, the inner ends of which are connected by a pivot 18 and the outer ends of which are connected. respectively to the panel 12 by a pivot 19 and to the wall of the shaft by a pivot 26. A motor 22, pivotally mounted on the shaft wall 10, is connected by a plurality of levers to the toggle lever 17 in such manner that rotation of the motor in one direction will raise the toggle levers 16 and 17 to open the door panels 11 and 12, while rotation'of the motor in the opposite direction will move the levers 16 and 17 to their straight line positions to close the door panels 11 and 12.

The car C (Fig. 1) is provided with a door comprising two slidably mounted panels .24 and 25 movable in opposite directions in a manner lsimilar to the hatchwaydoors. The actuating mechanism for the car door differs from the actuating mechanism for the hatchway door in that it comprises two levers 26v and 27 mounted on pivots 28 and 29 stationary on the car. One end of each pivoted member is slidably connected to a panel of the car door as at 3i) and 31, and the opposite ends arev connected through link members 32 and 33 to diametrically opposite points on a worm wheel 34 which is driven by a motor 35. When the motorv is rotated in one direction, the worm wheel 34 is rotated to move the levers 26 and 27 to open the Vcar door and when the motor 35 is' rotated in the oppositev direction, the door panels are moved toward each other to close the entrance to the car.

Inasmuch as a hatchway door and a motor foroperating it are located at each iloor, some means must be provided for selectively connecting the hatchway door motor at the iioor at, which a stop is to be made to a circuit through which it may be operated. To accomplish this purpose, a relay switch RS is located at each floor to be closed byan inductor relay IR when the car is to make a stop at that iioor.

The inductor relay IR is carried on the car in such position that it will come opposite the induotor plate RS of the relay switch as the car approaches the level of the oor at which it is to stop. Y

The inductor relay IR is provided with an energizing coil which is connected to the control system through deenergization of the high speed relay 4 whenever the car is decelerated to make a stop, as shown in Fig. 1. Thus itis seen that the inductor relay will be energized to operate the relay switch at avfloor only when the car isr to stop at that floor.

The direction oie operation of the door operating motors 22 and 35 is controlled by door opening relay O and a door closing relay C. A door operating relay 45 is provided for controlling the opening and closing relays O and C. When the door relay 45 is deenrgized, the car door and the corresponding hatchway door open. When the door relay 45 is energized, the car and the hatchway door open a pair o car door contact segments.v A pair of door contact segments b and c are so disposed on the cai` switch` CS and so connected to the coil of the door operating relay 45 that that relay will be deenergized when the car switch is moved to the car and energized when the switch is moved to start the car.

A pair of suitable limit switches LS and LS are provided for disconnecting the door motors .from their source of electrical energy when the doors reach their fully open or fully closed position.

inasmuch as door motor and the system for operating the car the hatchway door motor is fully illustrated and described in a copending application, Serial No. 420,092, filed January 11, 1936, a further detailed description oi the systern will not be given.

A door protective relay 41 and a time element door protective relay 48 are also associated with the door operating relay 45 for further controlling its operation under certain conditions to be hereinafter described.

In order that the hatchway door panels 1l and 12 may be positively locked in their closed posi.- tion, and arm 39 "is pivotally attached at its upper end by a pin 40 to the door operating toggle lever 17. To the lower end of the arm 39 isV firmly connected a shaft 42, the lower end of which is connected by a swivel joint 43 to the upperend of a square rod 44 which extends downwardly through a square opening 46 in a loc-k basing 47 in such manner that the rod will be moved up or down in the casing when the toggle lever 17 moves up or down in opening or closing the door.

A notch 50 is cut in the right hand side of the lower portion of the square rod 44 in such manner that a latch 51 may rest therein when the rod is in its lowermost positionby reason of the hatchway door being in its closed position. As shown, the lower end of the latch 51' imp inges against the lower ace of the notch 50 in such manner that not move upwardly to permit opening or the hatchway doors unless the latch is witlfidraavn.

'by permits the square rod 44 to move upwardthe square rod 44 can- LID , from the supply Y,conductor L2.

ly when the toggle lever 17 is moved to open the hatchway door panels ll and 12.

The electromagnet 54 is connected in a circuit that extends through the contact members a of the relay switch RS at each floor landing in such manner that when the car stops at a landing, and the inductor relay 11R.v energizes the relay switch RS at that landing, the electromagnet will be energized to raise the armature 53 and thereby remove the latch 51 from the notch 50 and the square rod 44.

The left hand arm 55 of the latch 51 extends past a keyhole 59 in the Wall of the shaft in such manner that a key 60 may be inserted in Vthe shaft and turned to depress the arm and thereby move the latch 51 out of the notch 50, thereby providing a means whereby the door may be unlocked in case of an emergency.

A switch 62 comprising a pair of contact members a and b is connected to the underside of the armature 53 in such manner that the switch will be opened when the door is unlocked and will be closed when the door is locked. The contact members a are secured to the underside o the armature 53 by means of a suitable bolt and are disposed in such position asto cooperate with the contact members b, which are mounted, by means of bolts 64, in a bracket 65 disposed on the lock-casing 47. The lower portions of the bolts 64 are constructed to serve as the binding posts to which the electric conductors controlled by the switch may be attached.

The lock-casing 47 is rmly secured, by suitable bolts 49, to the upper portion of the casing of the door motor 22, which in turn, is rmly secured to the Wall 8 of the hatchway.

The switch 62 controls the operations of the doorprotective relay 41 in such manner that, when the hatchway door is unlocked, it will be moved to its open position and a gap in the' car control circuit will be opened, after a predetermined period, to prevent further operation of the car until the hatchway door is reclosed and locked.

rlhe invention may be best understood from an assumed operation of the system.

Assuming that the car C is standing at a iloor with the doors open and that the car attendant, desiring to move the car upwardly, moves the `car switch CS in a counter-clockwise direction;

then the contact member b on the car switch engages the cooperating contact member c to complete a circuit for energizing the relay 45 to effect the closing of the car door and the hatchway door, .which circuit extends from the supply Vconductor L1 through conductor 70, junction point 71, conductor 72, the contact members a, of relay 48, conductor 73, junction point 74, conductor 75, the coil of relay 45,

yconductors 76 and 77, theicontact members cV and b of car switch CS, and conductor 78 to supply conductor L2.

The energization of the relay 45 closes its Contact members a thereby energizing the door closing relay C through a circuit extending conductor L1 through conductor 30, the coil of relay C, conductor 81, limit switch LS', conductor 82, the contact members a of relay 45, and conductors 83 and 84 to supply V,ductor L1 through conductor 86 to junction to theV junction point 89, thus placing bothI elds in parallel relation.- From the junction point 89, the circuit extends through conductors 94 and 95, the contact members a of relay C, and conductor 96 to the junction .point 97,

Where it again divides, one branch extendingV through conductor 98, the armature of car door motor` 35 to the junction. point 99; and the other branch extending from the junction point 97 through conductorslOO and 101, the contact members c of switch RS, the armature of hatch- Way door motor 22 and conductors 102 and 103 to the junction point 99. Thus the armatures cf both motors are connected in parallel with each other and in series with the i'elds.l From the junction point 99, the circuit extends throughv conductors 104 and 105, the Vcontact members b or" relay C and conductor 106 to the supply conductor L2. car door motor 35 rotates the worm wheel'34 to operate the levers 26 and 27 to close the car door.

VThe energization of the hatchway door motor 22 causes it to straighten out the toggle levers 16 and 17, thus moving the hatchway door panels 11 and 12 to their closed position.

Inasmuch Aas the square rod 44 in the mechanical lock is connected to the toggle lever 17, the closing movement of the toggle lever pushes the square rod downwardly through the lock-casing 47 and; as the door comes'to its fully closed position, the latch 51 drops into the notch 50,v thereby .locking the. hatchway door in its closed position.

Y The movement of the latch 51 into its locking position and the notch 50A also causes the contact members a and b of the switch 62 to close, thereby 'completing a circuit to energize the door protective relay 41 for the purpose of rendering the car control circuit effective to permit operation of theY car and also for the purpose of preventing operation of the door opening relay to the doors while the car is running. The circuit for relay 41 extends from the supply conductor L1 through conductor 108, `switch 62,

conductor 109, the contact members of switch The closing of the contact members a on the energized re1ay141-` completes a circuit for The `energization of the energizing the time element door protective re- Y lay .48 extending from supply conductor L1 through conductor k70, junction point 71, con'- ductor 113, the `contact members ci of -relay 41, conductor 114, Vthe coil of relay 48,y andfconductors 115. and 111 to supply conductor L2.

The closing Aof the .contactmembers' b of theenergized relay 48 closes a safety gapinV the car control system rendering it effective to permit operation' of the car now that the hatchway door is closed andlocked.

Returning now to the energization of relay 41, the closing of its contact members b and its contact members 1c complete a circuit for the door operating relay 45 which Will cause that relay to be maintained in its door closing position until the hatchway Vdoor is unlocked,

regardless of the position Vof thecar switch or 155' and 111 `to supply conductor L2.

" the speed of...the car.

other portions of the system. This circuit extends from the supply conductor AL1 through conductors and 113, the contact 'members b of relay 41, conductors 79 and 75, the coil of relay 45, conductors 76 and 85, the Contact members c of relay 41 and conductors 106, 115

The opening of the contact members d of the energized relay 41 adds a safety factor in preventing the completion of theA circuit ofthe door opening relay O and the consequent operation of `the door motors until the hatchway door is unlocked.

As the car attendant moves the car switchv CS further in a counter-clockwise direction, Vthe contact member a of that switch engages a cooperating contact member d and thereby completes ai circuit forr energizing thev up direction switch l lto effect the upward operation of the car. This circuit extends from supply conductor L1 through conductors 7G and 116, contact members a and d of the car switch CS, conductor 117, the coil kor" up direction switch 1, conductors 118 and 119, the

coil of brake relay 10 conductor 120, the contact members b of relay 48 and conductors 121 and'122 .to supply conductor L2.

The-energization ofthe brake relay 10.releases the brake 9 and permits the operation of the hoisting drum D. v

The closing of the contact members a oi up direction switch 1 completes a self-holding circuit for the coil of that switch which extends from supply conductor L1, through conductors `70 and 124, the contact members of inductors relay S, conductors and 126,v the contact member a of switch 1, the'coil of switch 1 and thence to supply conductor L2, as previously described.

The closing of the contact members b and c of up direction switch' 1 energizes the auxiliary' field lwinding .GF of the generator G to operate the driving motor EM to move the car upwardly. This circuit extends from supply [conductor L1 through conductorv 128, the con-y tact members b of switch 1, conductor 129,

viield winding GF, conductors and 131, the

contact members c of switch 1, conductor 132, resistors R1 and R2 and conductor 133 tosupply conductor L2.

A still further movement of the car switch CS causesy its contact member a vto engage its cooperating contact 'member e thereby energizing the intermediate speed relay 3 to increase This circuit extends from supply conductor L1 through conductors 70 and 116, the contact members a ande of car switch CS, conductor 135, vthe coil of relay 3 and conductors 136 and 137 to supply conductor L2.

The closing of the contact members a of the energized speed relay V3 completesa self-holding circuit for that relay extending from supply conductor L1 through conductors 70 and 139, the contact members of inductor relays SD and SU, conductor 140, the contact members a and the vcoil of relay 3 and conductors 13 6 and 137 to supply conductors L2.

lThe closing .of the contact members b of the relay 3 shunt the resistor R1 from the circuit of the held winding GF and thereby causes the speed of the car to be increased.l j

Assuming now that the car attendant moves the car switch still further to its high speed position, then the high speed relay 4 will be energized'to increase the speed oi the car. This circuit extends from supply conductor L1 through conductors 70' and '115, the contact members a and f of the car switch CS, Vconductor 142, the coil of vrelay 4 and conductors 143 and 137 to the supply conductor L2.

The closing of the contact members a of the energized relay 4 completes a self-holding circuit for that relay extending from the supply conductor L1 through conductors 70 and 143, the contact members of high speedV inductor relays HD and HU, conductor 144, the contact members a of relay 4, conductor 145, the coil of relay 4 and'conductors 143 and 137 to supply conductor L2.

. The closing oi the contact members b of relay 4 shunts the resistor R2 from the circuit of the eld Winding GF, thereby still further increasing the speed of the car.

= The opening Vci the'contact members c of the relay 4 prevents any energization of the inductor relay 1R on the car to unlock and operate the hatchway doors until the high speed relay 4 again deenergized to decelerate the car to a stop. I

Assuming new that the car attendant, desiringto stop the car at a iloor on its upward travel, moves the car switch to its center position, thenthe car stopping inductor relays on the car are energized to effect the decelerationr and stopping of the car through a circuit ,ex-

thecar to its intermediate speed.

As the car continues its approach to the landing, the energized inductor relay SU passes the inductor plate SU" and isr operated thereby to open its contact members to deenergize the intermediate speed relay 3. The opening of the Contact members b on the intermediate speed relay 3 reinserts the resistor R1 in the circuit for the iield winding GF and thereby decelerates the car toits low speed.

Returning now to the deenergization of the high speed relayA 4, that operation closed its Contact members c and thereby completed a circuit for energizing the inductor lrelay IR on the car for-operating the movable switch RS at the floor landing. This circuit extends from supply conductor L1 through conductors 85 and 151, theV `scribed for the generator eld GF to decelerate 12o or ten inches of the floorH level,` the energized movable switch' RS' completes a circuit for ener-l gizing the electromagnet 54 to pull up the armature 53 and thereby unlock the hatchway door at the floor at which the car is decelerating to lzo ` av stop. This circuit extends from the supply conductor L1 through conductors 70 and 154, the coil of electromagnet 54, the contact members a of switch RS, conductor 155, the contact members h andb on the car switch and conductors 78 and 122 to the supply conductor L2.

The iirst upward movement of the armature 5S opens the contact members of the switch 62 to deenergize the door protective relay 41 which opens its contact members a, b and c and closes its contact members d.

The continued upward movement or" the armature 53 withdraws the latch 51 from the notch 50 of the square rod 44 and thereby unlocks the hatchway door.

In the meantime, the opening of the contact members a of the deenergized relay 41 has deenergized the time element door protective relay 48 to open the contact members b of that relay. However, relay 48 is provided with a dashpot 157 which operates to prevent the opening oi the contact members b of relay 48 until after the expiration of a predetermined period of time, which should be so selected as to give the elevator car suflicient time to level into the iioor at which it is stopping before the contact members b open.

The opening of the contact members b of the deenergized relay 41 deenergizes the door operating relay 45 to close its contact members b and thereby complete a'circuit for energizing the door opening relay O to eiect the opening oi' the car door and the hatchway door, which circuit extends from supply conductor L1 through conductor 80, the coil of relay O, conductor 158, limit switch LS, conductor 159, the Contact members d of relay 41, conductor 160, the contact members b oi relay 45 and conductor 84 to the supply conductor L2. It will be noted that this circuit passes through normally closed Vcontact members d on the deenergized door protective relay 41 so that the door opening relay` O cannot be energized'until the relay 41 is deenergized by the unlocking of the mechanical lock on the door.

The closing of the contact members a and b -on the energized door opening relay O completes a circuit for energizing the car door motor 35 and the hatchway door motor 22 in the same manner as previously described in the opening of the door except that the current through the armatures is reversed; that is, instead of passing through the junction point 97 to the junction point 99, the current now passes from the junction point 99 through the armatures to the junction point 97. The doors now move to their open positions and the motors are stopped by the operation oi the limit switch LS in the usual manner. It is to be understood that the doors start to open when the car is still eight or ten inches away from the level of the landing and are in their fully-open position by the time the car comes to rest at the floor landing. Y

As the car arrives at the iinal stopping point, the inductor relay S comes opposite the inductor plate S and is operated to open its contact members, thereby opening the self-holding circuit for the up direction switch 1 to deenergizeV that switch. The deenergization of the up direction switch 1 stops the driving motor EM and applies the brake 9 to stop the car level with the floor.

The delayed operation of the time element relay 48 now takes place. The closing of the contact members a on the relay 48 prepares a circuit through which the door operating relay 45 may be operated to close the doors when the car is to bestarted. The' opening of the Contact members b on the relay 48 opens a gap in the control circuit which makes it impossible to operate the car again until the doors are reclosed and locked. i

. Assuming now that the stop has been completed and the car attendant, desiring to continue his upwardtravel, again moves the car switch in. the counter-clockwise direction. Then the doors will be closed and locked, the up direction switch 1', the intermediatespeed relay 3 and the high speed relay 4 will be energized successively and will operate as previously described to cause the car to start and accellerate to its high speed- Y Therefore, it is seen that I have provided a definite sequence or" operation in decelerating the car, unlocking andvopening the doors, stopping the car and thereafter rendering the control system ineiective to again start the car until the doors are reclosed and locked, and `that such a definite sequence of operation will prevent unsafe operation of the elevator while the doors are unlocked.

I claim as my invention:

l. In an elevator system embodying a car and a motor for driving said car past a oor landing, the combination with a door, a lock for locking the door in its closed position, and means for unlocking said locking means, of means operably responsive to operation of the unlocking means for stopping the driving motor at a predetermined length of time after the unlocking of the door.

2. In an elevator system embodying a car and a'rnotor for driving said car past a'loor landing, the combination with a door, a lock for locking the door in its closed position, and means for unlocking said locking means, of means operably responsive to operation of the unlocking means for stopping the driving motor and .means for delaying Ythe operation of I the motor stopping means for a predetermined length of time after the unlocking of the door.

3. In an elevator system embodying a car and a motor for driving said car pasta loor landing, the combination with aV controll system for said motor, a door, a lock for locking lsaiddoor fin its closed position and means for unlocking said locking means, of means operably responsive to operation of said unlocking means for rendering said control system ineiective Vto operate said motor after the expiration of a predetermined length of time after the operation of said unlocking means.

4. In an elevator system embodying a car and a motor for driving said car past a floor landing,

the combination with a control system for said motor, a door, a lock for locking said door in its closed position and means for unlocking said locking means, of means operably responsive to operation of said unlocking means for rendering said control system ineffective to operate said motor after the expiration of a predetermined length of time after the operation of said unlocking means and operably responsive to operation of the locking means to lock the door for rendering said control system eiective to operate saidmotor.

5. In an elevator system embodying a car and a motor for driving said car past a floor landing, the combination with a control system for controlling said driving motor, a door, a

motorkfor operating said door, la lock for locking the door in itsclosed position, means operably responsiveto the combined operation of the control system to decelerate the'driving motor and the position of the car for partially'completing a circuit for the door motor and for unlocking the locking means, and means operably responsive to operation of the unlocking means for completing the circuit for the door motor. to open the door.

6. In an elevator system embodying a car and a motor for driving saidcar past a floor control system ineffective to operate saidmotor after the expiration or" apredetermined length of time after the unlocking of the door;

'7. In an elevator` system embodying a car and a motor for driving said car past a floor landing, the combination with a control system for controlling said driving motor, ka door, a motor for operating. said door, ra lock for locking the door inits closedpcsition, means operablyresponsive to the combined operation of the control system A to decelerate the driving motor and the position of the car or partially completing a circuit for the door motor and for unlocking the locking means, and means operably responsive to operation of the locking means for completing the circuitfor the door motor to open the door and for rendering said control system ineffective to operate said motor after the expirationrof a predetermined length of timeaiter the unlocking ofV the door and responsive vto the locking Aof the door for'renderlng the control system effective to operate thedrivins motor,

8. In anl elevator system embodying a car, a motor for driving said car past a iloor landing, and a door at said landing, the combination with Y a control system for, `controlling said driving motonof al lock forV locking said door in its closed position,4 means operably responsive. to the combined operation .of the control system to decelerate the driving motor and the position ofthe car for partially completing a circuit for the door motor .and for unlocking the lock before the car reaches the oor landing, means operably responsive to movement of the lock to its unlocking position for completing the circuit for operating the door motor to open the door before ythe car reaches the floor landing, means operably responsive to operation of the control system for stopping the car level with the iloor landing after the door starts to open, and means operably responsive to movement of the lock to its unlocking position for rendering the control system ineiective to operate the driving motor after a sufficient length o time vsubsequent to the movement of the lock to its unlocking position to permit the car to beA stopped level with the floor landing by the stopping` means.

`9, In an elevator system embodying a car, a

motor for driving said car past a floor landing, a door at said landing and a motor :for` operating the door, the combination With a control system for controlling said driving motor, of a lock for locking said'door in its closed position, means operably responsive to the combined operation of tlie control systemto decelerate the driving motor and the position of thecar for partially completing a circuit for the door motor and for unlocking the lock before the car reaches the floor landing, means operably responsive to movement of the lock to its unlocking position for completing the circuit for operating the door motor to open the door before the .car reaches the iloor landing, means operably responsive to operation of tbe control system for stopping the car level with the floor landing vafter the door starts to open, Iand means operably responsive to movement of the lock to its unlocking posi.- tion for rendering the control system ineffective to operate the driving motor after a surlicient length of time subsequent to the movement of the lock to its unlocking position to permit the car to be stopped level With the floor landing by the stopping means and operably responsive to the locking of the Vdoor for rendering the control system eective to operate the driving motor.

HAROLD V. MCCORMICK. 

